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Analog Devices Inc./Maxim Integrated MAX6750KA16+T
- Part No.:
- MAX6750KA16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6750KA16+T.pdf
- Description:
- IC SUPERVISOR UP RESET CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6750KA16+T from Maxim Integrated is a low-power microprocessor supervisory circuit with dual-voltage monitoring (VCC and RESET IN), factory-trimmed 1.575V reset threshold (±2%), capacitor-adjustable reset timeout (5.7–9.5ms typical), and capacitor-adjustable watchdog timeout. It features push-pull or open-drain active-low RESET output, AEC-Q100 qualification, and operation across –40°C to +125°C for automotive and battery-powered controller applications.
For engineers reviewing the MAX6750KA16+T datasheet, MAX6750KA16+T pinout, MAX6750KA16+T application, or MAX6750KA16+T equivalent, key selection criteria include its dual-supply monitoring capability, ±2% VTH accuracy over automotive temperature range, 3.7µA supply current at VCC ≤ 2.0V, and compatibility with external resistor-divider for adjustable RESET IN threshold.
Technical Context
The MAX6750KA16+T implements dual-voltage supervision: one path monitors VCC against a factory-trimmed 1.575V threshold (±2%), while the second monitors an external voltage via RESET IN with a fixed 1.235V comparator threshold. Reset assertion occurs when either falls below its respective threshold, and reset remains asserted for a capacitor-determined timeout period (tRP = 4.94 × 10⁶ × CSRT).
It supports capacitor-adjustable watchdog timing (tWD = 4.94 × 10⁶ × CSWT for normal mode) but lacks WDS input or windowed watchdog logic-features reserved for MAX6746–MAX6751 (WDS) and MAX6752/MAX6753 (SET0/SET1). Manual reset (MR) is not present; instead, RESET IN serves as the sole external reset trigger.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VCC) | 1.575V ±2% - ensures reliable brownout detection across automotive temperature range without external resistors. |
| RESET IN Threshold | 1.235V ±0.019V - enables precise external voltage monitoring using resistor divider (e.g., 3.3V rail at 1.235V × (R1+R2)/R2). |
| Supply Current | 3.7µA (typ) at VCC ≤ 2.0V - minimizes quiescent load in battery-critical systems like portable medical devices. |
| Reset Timeout Range | 0.51–9.49ms - set by 100pF–1500pF capacitor on SRT pin, covering µP power-up sequencing from fast MCUs to slow peripherals. |
| Watchdog Timeout Range | 0.51–9.49ms (normal mode) - determined by 100pF–1500pF capacitor on SWT pin; no extended or windowed mode support. |
| Operating Temperature | –40°C to +125°C - fully specified for under-hood automotive and industrial embedded environments. |
| Package | 8-pin SOT23 (K8+5) - surface-mount footprint with 1.6mm × 2.9mm body, compatible with high-density PCB layouts. |
Pinout & Package
MAX6750KA16+T is housed in an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176), RoHS-compliant, with thermal resistance θJA = 196°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Adjustable voltage monitor input | High-impedance node for external resistor-divider; asserts reset when voltage drops below 1.235V. |
| 2 - GND | Ground reference | Primary return path for internal comparators, reset timer, and leakage-limited biasing. |
| 3 - SWT | Watchdog timeout capacitor connection | Connects to ground via capacitor (CSWT) to set normal-mode watchdog timeout (tWD = 4.94×10⁶ × CSWT). |
| 4 - SRT | Reset timeout capacitor connection | Connects to ground via capacitor (CSRT) to set reset timeout period (tRP = 4.94×10⁶ × CSRT). |
| 5 - VCC | Main supply input | Power source (1.2–5.5V) and monitored rail; powers internal circuitry and enables VCC-supply reset detection. |
| 6 - WDI | Watchdog input | Falling-edge-triggered; must be toggled within tWD to prevent watchdog-induced reset; minimum pulse width 300ns. |
| 7 - RESET | Active-low reset output | Push-pull or open-drain output; guaranteed valid for VCC ≥ 1V; sinks 50µA @ 0.3V max VOL. |
| 8 - NC | No connect | Internally unused; must remain unconnected per datasheet pin configuration for MAX6750. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage supervision | Simultaneously monitors VCC (1.575V ±2%) and external rail via RESET IN (1.235V), enabling robust system-level power integrity checks. |
| Capacitor-adjustable timing | Independent reset (SRT) and watchdog (SWT) timeouts set with standard ceramic capacitors-no trimming resistors or programming required. |
| AEC-Q100 qualified | Validated for automotive applications including engine control units and ADAS sensors operating at –40°C to +125°C. |
| Low-power operation | 3.7µA typical supply current at VCC ≤ 2.0V extends battery life in portable controllers and IoT edge nodes. |
| Transient-immune reset logic | Rejects VCC glitches ≤50µs when falling 100mV below threshold-eliminates false resets in noisy electrical environments. |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 5V main supply and 3.3V microcontroller I/O rail during cold cranking and load dump events. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset if either rail dips below specification, with 7.6ms timeout ensuring full µP initialization before release. Use Value: Prevents erratic ECU behavior during transient voltage sags by guaranteeing clean reset assertion and hold time aligned with processor requirements. | Use Scenario: Supervises 3.3V MCU supply and 1.8V sensor interface rail in battery-powered infusion pump with strict safety-critical uptime requirements. IC Role / Device Role / Timing Role: Provides independent reset generation for two critical voltage domains, with capacitor-tuned timeout matching pump motor startup sequence. Use Value: Enables fail-safe shutdown and restart on undervoltage, meeting IEC 60601-1 leakage and reliability mandates for Class II medical devices. |
| Industrial PLC Remote I/O Module | Battery-Powered Smart Meter |
Use Scenario: Ensures deterministic boot of ARM Cortex-M7 core after 24V DC input fluctuations caused by relay switching and field wiring noise. IC Role / Device Role / Timing Role: Acts as primary power-on reset generator with 1.575V VCC threshold and 1.235V RESET IN threshold for auxiliary 5V regulator monitoring. Use Value: Eliminates need for discrete RC reset networks, reducing BOM count and improving long-term timing stability over temperature. | Use Scenario: Maintains secure firmware execution in AMI smart meter during lithium-thionyl chloride battery discharge from 3.6V to 2.0V. IC Role / Device Role / Timing Role: Supervises main MCU supply and RTC backup rail, with ultra-low 3.7µA ICC enabling >15-year battery life in always-on mode. Use Value: Guarantees valid reset signal down to VCC = 1.0V, preventing code corruption during end-of-life battery brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6751KA16+T | Includes manual reset (MR) pin; otherwise identical VTH, timing, and dual-monitoring architecture. | Required where operator-initiated reset or external logic-controlled reboot is needed (e.g., field-serviceable equipment). | Select MAX6751KA16+T only if MR functionality is mandatory; MAX6750KA16+T reduces pin count and simplifies layout where MR is unnecessary. |
| TLV803EB25DBZR | Single-supply (2.5V fixed threshold), no RESET IN input, no watchdog, 1.8µA ICC, SOT23-5 package. | Suitable only for basic single-rail reset without supervision flexibility or watchdog safety layer. | Choose TLV803EB25DBZR for cost-sensitive, space-constrained designs needing only VCC reset-no dual monitoring or watchdog capability. |
Compared with MAX6751KA16+T, MAX6750KA16+T omits MR for tighter integration in automated systems; versus TLV803EB25DBZR, it adds dual-rail supervision, watchdog, and automotive-grade temperature support-justifying its use in safety-critical embedded controllers.
Availability
MAX6750KA16+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, industrial PLC remote I/O modules, and battery-powered smart meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6750KA16+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and computing markets.
The MAX6746–MAX6753 product line delivers configurable µP supervisors with capacitor-adjustable timing and AEC-Q100 qualification, targeting automotive and high-reliability embedded systems demanding robust power-up, brownout, and watchdog protection.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6750KA16+T?
The MAX6750KA16+T has a factory-trimmed VCC reset threshold of 1.575V with ±2% tolerance over –40°C to +125°C. This value is laser-trimmed during production and does not require external components. The suffix "16" in the part number directly corresponds to this 1.575V threshold per Table 2 in the datasheet. The RESET IN input uses a separate fixed 1.235V comparator threshold.
Does MAX6750KA16+T support manual reset (MR) functionality?
No, MAX6750KA16+T does not include a manual reset (MR) pin. Pin 1 is designated RESET IN-not MR-and functions solely as an adjustable voltage monitor input. For manual reset capability, select MAX6751KA16+T, which replaces RESET IN with MR on pin 1 and retains identical VCC threshold, timing, and dual-supply architecture.
What watchdog modes are supported by MAX6750KA16+T?
MAX6750KA16+T supports only normal-mode watchdog timing, set by capacitor CSWT on the SWT pin (tWD = 4.94 × 10⁶ × CSWT). It does not support extended mode (no WDS pin) or windowed watchdog (no SET0/SET1 pins). Its watchdog is functionally identical to MAX6746–MAX6751 normal mode-lacking the 128× extension or min/max fault detection of MAX6752/MAX6753.
Can MAX6750KA16+T monitor two independent supply rails simultaneously?
Yes, MAX6750KA16+T performs true dual-voltage monitoring: VCC is compared against its factory-trimmed 1.575V threshold, while RESET IN monitors an external rail (e.g., 3.3V or 5V) using a fixed 1.235V comparator. RESET asserts if either voltage falls below its respective threshold. This eliminates the need for two separate supervisors in compact, multi-rail systems.
What is the minimum supply voltage required for guaranteed RESET output validity in MAX6750KA16+T?
MAX6750KA16+T guarantees valid RESET logic state (VOH/VOL within spec) for VCC ≥ 1.0V. Below 1.0V, output drive strength degrades; however, the device continues to monitor VCC and assert RESET as long as internal biasing remains functional. For applications requiring RESET validity down to 0V, a pull-down resistor (e.g., 100kΩ) is recommended on push-pull variants-but MAX6750KA16+T's RESET output type must be verified per orderable suffix.
MAX6750KA16+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 1.575V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6750KA16+T FAQ
1.How can I place an order for MAX6750KA16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6750KA16+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6750KA16+T reliable?
The price and inventory of MAX6750KA16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6750KA16+T is usually 5 days.
3.What payment methods are accepted for MAX6750KA16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6750KA16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6750KA16+T?
MAX6750KA16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6750KA16+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6750KA16+T?
For technical support, including MAX6750KA16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6750KA16+T requirements.
6.How does Aetrix verify that MAX6750KA16+T is sourced from the original manufacturer or authorized distributors?
All MAX6750KA16+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6750KA16+T meets industry standards.
7.What is the process for return or replacement of MAX6750KA16+T?
All MAX6750KA16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6750KA16+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6750KA16+T part is unused and in its original packaging.
Return procedure for MAX6750KA16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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